Gas-burner.



A. s. PLOWMAN.

1 GAS BURNER. APPLIOATION FILED Nov. 6, 1909. RBNEWBD 00T. 7, 1913.

Patented May 12, 1914.

I! Il @Www/:Leo ka r mi ffm ARTHUR S. PLOWMAN, OF NEW YORK, N. Y.

GAS-BURNER.

Patented May i2, 1914.

Application filed November 6, 1909, Serial No. 526,498. Renewed October7, 1913. Serial No. 793,961.

To all whom it may concern Beit known that I, ARTHUR S. lLowMAN, acitizen ot the United States, residingin the city, county, and State ot'New York, have invented certain new and useful Improvements inGas-Burners, of which the following' is a specification.

My invention relates to selt-igniting gas burners, the kind wherein apilotlight continuously burns and serves to ignite the main jet when thevalve is operated to turn on the gas.

The object o'l' the invention is to construct a gas burner in suchmanner that the piston operating` to control the means for opening' andclosing the main ,eas conduit will at no time be in contact with thegas, but will be operatable within a separate compartment to control thevalve closing means.

I am aware that heretofore gas burners employing' a pneumaticallyoperated piston for opening and closing;` the main gas conduit are knownto the art, and have been in practical operation, but not successfully,owing to the tact that the impurities carried by the gas are depositedon the piston, causing it to stick so firmly that the operation of theair pump will not move it. It is impossible to use this form of valvefor outdoor lighting in cold weather because the condensation whichoccurs, will. vfreeze around the piston and prevent it from being`operated. To obviate these di'lliculties I have devised a z(gas burnerin which I preferably use a ball valve seated on the intake opening ofthe main gas conduit, and placing directly over said valve a cylinderhaving therein a magnetized reciprocating piston. When the piston is inone of its extreme positions the ball is without the influence of saidmagnetic piston, but when the piston is driven over the path of theball, pneumatically or otherwise, said ball will come within theinfluence of the magnetic piston and be moved oli its seat and held oftas long` as the piston remains at the extreme ot its other position. Byconstructing the device in this manner it will be readilynoticed thatthe impurities in the gas cannot-be deposited on the piston to preventits operation, nor will the freezing; of the condensation ailiect it.

lVith these ends in view I have constructed the hereinafter describedinvention which will be described in detail and the points of noveltyand merit pointed out in the claims.

In the accompanying` drawings: Figure 1 is a central vertical section otmy improved gas burner. Fig'. 9. is a similar section but at rightanales to that ot Fig. l. Figs. 3 and il; are modified forms oil' thegas burner.

In the practical operation and construction oi? my invention, l is thevalve casing having an internally threaded lower portion into which isscrewed the supply or bracket pipe Q. Directly over the lower portion2,is an internally threaded portion 3 to which is attached the ordinaryburner 1l. This burner may be in the torni shown or a mantle, it notbeing material to thc'invention involved. Bored transversely through thecasino; is an opening` 7 into which is iitted. in a gas tight manner, athin pipe S made of non-magnetic material. Screwed into the lowerportion oil the :asing' is a block 10 provided with an openingl1 and aconcaved or dished upper surface 112. Resting on the top ot this plugl0, directly over the opening` l1, and in such manner as to normallyclose said opening 1l, is a ball 15, made of any suitable magneticmetal, preferably steel. The passage of the gas from the supply pipe 2,is through opening- 11 in block l0 into the body ot the casing', aroundthe pipe S and through the opening' in the upper portion of the casino`into the burner or mantle, as shown in Fig. Q. Sliding' freely withinthe tube 8 is a magnetized piston Q0 which is normally, or when the ,onsis cut oli', in the position shown in full lines in Fig. 1, that is, sothat the ball 15 is just without the influence ot said piston. Securedin one end ot the tube 8, in any suitable manner, is a plukg- 25 havinga vent hole 26 therein to relieve the pressure when the piston is movedto the position shown in dotted lines in Fig. l. The other end of thetube S also has a plup; 28 secured therein. To this plug` attached anair supply and exhaust tube 30 which leads to any kind or style et thewell known devices tor compressing' and exhausting' air. ln order toprevent the piston 'from being4 jarred or moved from the position itshould maintain, I place on one cud thereof a spring 38, one end oitsaid spring' being fastened to the piston by means oi a screw 35 thet'rce end pressing1 against the Awall of the tube, This spring willproduce suiiicient friction to hold the piston in the desired position.Secured in the casing 1 and provided with an opening a0 leading directlyinto the supply 2, below the ball 15, is a pipe ll which leads up to thetop of the burner and supplies the gas for the pilot light in the mannercommon to this style of burner.

The operation of the device, assuming the parts to be in the positionshown in Fig,y 1, is as follows: Air is forced through tube 30 into tube8 against the piston 20 causing said piston to be driven through thetube until it strikes the plug 25. The piston being magnetized, andsliding within and surrounded by non-magnetizable material, will actdirectly upon the ball 15. TWhen the piston passes through the tube overthe ball, it will hold the ball within its magnetic influence and carrysaid ball olf its seat and into the position shown in dotted lines inFig. l. In this position the ball will be held as long as the pistonremains in the position of Fig. 1, that is, with the gas passage open tothe burner. lVhen the air is exhausted from the tube 8 the piston willbe drawn back to its first position and the ball, being without theinfluence of the piston, will roll over the gas inlet 11 in plug orbloclr 10 and shut off the supply of gas. The top of the block 10 beingconcaved the ball will quickly close the opening 11.

By referring to Fig. 2 it will be noticed that the supply7 of gas isfrom pipe 2, through the block 10, around pipe 8 and out through the topportion of the casing to the burner 4:. By constructing the device inthis manner it can be readily seen that at no time does the gas come incontact with the piston, thereby keeping it free from all kinds ofsmudge or deposits and free from the possibility of freezing, by reasonof condensationl In Fig. 8 a modification is shown wherein the devicecan be used for inverted burners or mantles. In this form the casing 50has a vertical bore 51 into which is secured, in a gas tight manner, acup 52 with its closed end within the casing. Secured within the bore 51at the bottom, is a plug 53 provided with an opening 54. The top of thisplug is concaved in the saine manner as the plug or block 10 in Fig. 1and has resting thereon, directly over and closing the opening 54C, aball 55. Located within the cup 52 is a magnetized piston 56 which isnormally held in the position shown by friction, in the same manner aspiston 20. In the top of the cup is a plug 57 to which is attached anair supply and exhaust pipe 58. On one side of the casing is a gaspassage 59 which supplies the burner. A pilot light is used in thisburner in the same manner as shown in Fig. 2. When air is forced intothe cup 52 the piston will be driven down and immediately draw the ballwithin its magnetic influence and hold it in the position shown indotted lines permitting the free flow of gas to the burner. The ballwill remain in this suspended position until the piston is withdrawn toits upper position whereupon the ball will drop and shut off the flow ofgas.

In Fig. 4L a further modification is shown wherein two magnetic pistons65 and 66 are used. These pistons are contained within cups 67 and 68 inthe same manner as the piston 56. In this form the ball 70 ismagnetically held by one of the pistons in position to close the gaspassage, the other piston when brought into action draws the ball awayto free the gas passage. Leading from each of the cups 67 and 68 are airtubes 71 and 72 connected with air cylinders 73 and 74:. The pistons ofthe cylinders are worked simultaneously by the handle 80. It will benoticed that when t-he handle is pulled out the ball will be released bypiston 65 and drawn within the influence of piston 66 said pistonpulling the ball away from its seat sufficiently far to permit the freeHow of gas.

Claims. Y

1. In a gas burner, a valve operating within the gas passage to open andclose the same, and a pneumatically controlled reciprocating magnetwithout the gas passage capable of controlling said valve.

2. In a gas burner, a valve operating within the gas passage to open andclose the main conduit, and a magnetized piston. pneumatically operated,capable of controlling the said valve.

3. In a gas burner, a ball valve for opening and closing the mainconduit, and a magnetized piston capable of asserting its influence onsaid ball valve to control the same.

et. In a gas burner, a casing having a gas passage therethrough, a valvefor opening and elo-sing the same, and a magnetized piston capable ofmoving across said passage within a chamber not open to said gas passageand capable of asserting its influence on said valve to control thesame.

5. In a gas burner, a casing having a gas passage therethrough, a valvefor opening and closing the same, and a piston adapted to move acrosssaid passage within a chamber not open to said gas passage and capableof controlling said valve.

6. In a gas burner, a casing, a ball valve within said casing foropening and closing the gas passage, a cylinder projecting across saidpassage, and a magnetized reciprocating piston pneumatically operatedWithin said cylinder and capable of moving in a path sufiiciently closeto the ball valve to control the same.

7. In a gas burner, a casing, a valve Within said casing for opening andclosing the gas passage, a magnetized reciprocating piston operatingWithin a chamber separate 'from the gas passage and capable of moving ina path sufficiently close to the Valve t0 control the same.

8. In a gas burner, a easing having a 1ongitudinai passage therethrough,a valve Within said passage for opening and closing the, saine, a tubeWithin said casing to form a separate t0n within said tube capable ofasserting its magnetic influence on said valve to control the same.

ARTHUR S. PLOWMAN.

Witnesses WM. A. COURTLAND, LAURA E. MONK.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, C.

chamber, and a magnetized pis- 10

